# Postfix/Dovecot not installing
**URL:** https://discuss.freedombox.org/t/postfix-dovecot-not-installing/2541
**Category:** Support
**Created:** [April 10, 2023, 9:21pm UTC](https://discuss.freedombox.org/t/postfix-dovecot-not-installing/2541 "2023-04-10T21:21:39Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@ciamx](https://discuss.freedombox.org/u/ciamx)
#### Post date: [April 10, 2023, 9:21pm UTC](https://discuss.freedombox.org/t/postfix-dovecot-not-installing/2541/1 "2023-04-10T21:21:39Z")
**Problem Description**
Ive tried to install the Postfix/Dovecot server (1st) and the RoundCube app (2nd). Both of them return a number of errors.
**Steps to Reproduce**
1. Login to FreedomBox.
2. Click on apps and then Postfix/Dovecot
3. Click Install
**Expected Results**
Installs app
\*\*Actual results: this is the error output. I had to remove some references to debian URL in order to post.
Error installing app: (‘Apt command failed with return code: 100’, b’freedombox set on hold.\n’, b’\x1b[97m INFO\x1b[0m \x1b[94mplinth.app \x1b[0m Initialized apps - security, apache, sso, api, names, users, snapshot, dynamicdns, privacy, storage, avahi, cockpit, firewall, config, diagnostics, power, backups, ssh, help, datetime, upgrades, networks, letsencrypt, first\_boot, gitweb, mediawiki, pagekite, radicale, bepasty, deluge, wireguard, syncthing, transmission, minidlna, minetest, calibre, coturn, ejabberd, roundcube, email, samba, janus, shadowsocks, rssbridge, matrixsynapse, jsxc, bind, mumble, zoph, wordpress, searx, performance, sharing, openvpn, ttrss, quassel, i2p, shaarli, tor, infinoted, privoxy, ikiwiki\nE: Failed to fetch //debian/pool/main/libe/libexttextcat/libexttextcat-data\_3.4.5-1\_all.deb Could not resolve ''\nE: Failed to fetch //debian/pool/main/libe/libexttextcat/libexttextcat-2.0-0\_3.4.5-1\_amd64.deb Could not resolve ''\nE: Failed to fetch //debian/pool/main/d/dovecot/dovecot-core\_2.3.13%2bdfsg1-2%2bdeb11u1\_amd64.deb Could not resolve ''\nE: Failed to fetch //debian/pool/main/h/hyperscan/libhyperscan5\_5.4.0-2\_amd64.deb Could not resolve ''\nE: Failed to fetch //debian/pool/main/g/gcc-10/libatomic1\_10.2.1-6\_amd64.deb Could not resolve ''\nE: Failed to fetch //debian/pool/main/j/jemalloc/libjemalloc2\_5.2.1-3\_amd64.deb Could not resolve ''\nE: Failed to fetch //debian/pool/main/l/lua5.1/liblua5.1-0\_5.1.5-8.1%2bb3\_amd64.deb Could not resolve ''\nE: Failed to fetch //debian/pool/main/libl/liblzf/liblzf1\_3.6-3\_amd64.deb Could not resolve ''\nE: Failed to fetch //debian/pool/main/l/lua-bitop/lua-bitop\_1.0.2-5\_amd64.deb Could not resolve ''\nE: Failed to fetch //debian/pool/main/l/lua-cjson/lua-cjson\_2.1.0%2bdfsg-2.1\_amd64.deb Could not resolve ''\nE: Failed to fetch /security.debian.org/debian-security/pool/updates/main/r/redis/redis-tools\_6.0.16-1%2bdeb11u2\_amd64.deb Could not resolve ''\nE: Failed to fetch /security.debian.org/debian-security/pool/updates/main/r/redis/redis-server\_6.0.16-1%2bdeb11u2\_amd64.deb Could not resolve ''\nE: Failed to fetch //debian/pool/main/t/twitter-bootstrap3/fonts-glyphicons-halflings\_1.009%7e3.4.1%2bdfsg-2\_all.deb Could not resolve ''\nE: Failed to fetch //debian/pool/main/r/requirejs/libjs-requirejs\_2.3.6%2bds-1\_all.deb Could not resolve ''\nE: Failed to fetch //debian/pool/main/l/luajit/libluajit-5.1-common\_2.1.0%7ebeta3%2bdfsg-5.3\_all.deb Could not resolve ''\nE: Failed to fetch //debian/pool/main/l/luajit/libluajit-5.1-2\_2.1.0%7ebeta3%2bdfsg-5.3\_amd64.deb Could not resolve ''\nE: Failed to fetch //debian/pool/main/r/rspamd/rspamd\_2.7-1\_amd64.deb Could not resolve ''\nE: Failed to fetch //debian/pool/main/d/dovecot/dovecot-imapd\_2.3.13%2bdfsg1-2%2bdeb11u1\_amd64.deb Could not resolve ''\nE: Failed to fetch //debian/pool/main/d/dovecot/dovecot-ldap\_2.3.13%2bdfsg1-2%2bdeb11u1\_amd64.deb Could not resolve ''\nE: Failed to fetch //debian/pool/main/d/dovecot/dovecot-lmtpd\_2.3.13%2bdfsg1-2%2bdeb11u1\_amd64.deb Could not resolve ''\nE: Failed to fetch //debian/pool/main/d/dovecot/dovecot-sieve\_2.3.13%2bdfsg1-2%2bdeb11u1\_amd64.deb Could not resolve ''\nE: Failed to fetch //debian/pool/main/d/dovecot/dovecot-managesieved\_2.3.13%2bdfsg1-2%2bdeb11u1\_amd64.deb Could not resolve ''\nE: Failed to fetch //debian/pool/main/d/dovecot/dovecot-pop3d\_2.3.13%2bdfsg1-2%2bdeb11u1\_amd64.deb Could not resolve ''\nE: Failed to fetch //debian/pool/main/p/postfix/postfix\_3.5.17-0%2bdeb11u1\_amd64.deb Could not resolve ''\nE: Failed to fetch //debian/pool/main/p/postfix/postfix-sqlite\_3.5.17-0%2bdeb11u1\_amd64.deb Could not resolve ''\nE: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?\n\x1b[31m ERROR\x1b[0m \x1b[94m\_\_main\_\_ \x1b[0m Error executing action: Apt command failed with return code: 100\nTraceback (most recent call last):\n File “/usr/share/plinth/actions/actions”, line 92, in \_call\n return\_values = func(\*arguments['args'], \*\*arguments['kwargs'])\n File “/usr/lib/python3/dist-packages/plinth/privileged/packages.py”, line 69, in install\n raise RuntimeError(\nRuntimeError: Apt command failed with return code: 100\n’)
**Information**
Debian GNU/Linux 11 (bullseye) and FreedomBox version 23.5. FreedomBox is up to date.
I’m on a VPS with an AMD64 chip.
---
### Author:  [@nbenedek](https://discuss.freedombox.org/u/nbenedek)
#### Post date: [April 16, 2023, 10:06am UTC](https://discuss.freedombox.org/t/postfix-dovecot-not-installing/2541/2 "2023-04-16T10:06:29Z")
I ran into this issue as well while testing, running `apt-get upgrade` fixed it for me.
---
### Author:  [@daddy32](https://discuss.freedombox.org/u/daddy32)
#### Post date: [August 1, 2023, 8:36am UTC](https://discuss.freedombox.org/t/postfix-dovecot-not-installing/2541/3 "2023-08-01T08:36:13Z")
Same error AND solution in my case (installing “Performance”).